Coil-forming machine



Aug. 27, 1929.

'c. MCCORD v 1,725,992

COIL FORMING MACHINE Filed May 2, 1927 3 Sheets-Sheet l g/az/ig 4/ M50575, 3 M A; Eye/weir.

Aug. 27, 1929. c, McCORD 1,725,992

' con FORMING MACHINE Filed May 2, 1927 3 Sheets-Sheet 2 Aug. 27, 1929. c, McCORD 1,725,992

COIL FORMING MACHINE Filed May 2, 1927 3 Sheets-Sheet 3 Patented Aug. 27, 1929.

UNITED STATES CLAUDE M. MCCORD, OF RICHMOND HEIGHTS, MISSOURI.

COIL-FORMIN G MACHINE.

Application filed May 2, 1927. Serial No. 188,148.

This invention relates to machines for for ining armature and stator coils, etc.

An object of the invention is to provide a machine for winding armature and stator coils with a mechanism, so that the coils are given a shape and characteristic of practically overcoming the tendency of the coils to unwind when removed from the machine.

Another object of the invention is to provide coil winding machine for winding wire into coils about support, placing a stress in the coils to change the characteristic tendency of the coils to unwind and applying a lateral pressure against the end portions of the coils for the purpose of shaping them so that, when the coils are e ectcd from the support on which they are wound, they retain their proper shay e without the use of tying elements.

Other objects will appear from the following description, reference being made to the drawings, in which Fig. 1 is a side elevation of my improved machine.

Fig. 1 is a view looking toward one of the side edges of a coil made by this machine.

Fig. 1 is a side elevation of the coil.

Fig. 2 is a partial plan view, a few of the parts being shown in section.

Fig. 3 is a sectional view of the devices by which the coils are subjected to stress to overcome the tendency of the coils to unwind when removed from the machine.

Fig. 4 is a bottom plan view of the mechanism shown in Fig. 3.

Fig. 5 is a side elevation of a sliding supportor carriage on which one of the coil straining elements pivotally mounted.

Fig. 6 is an enlarged end elevation of the mechanism shown in Fig. 4.

Fig. 7 is an end elevation of the device upon which the ends of the coils are wound.

The driving mechanism 1 is provided with an cngagcable and releasable magnetic clutch 2 for rotating the shaft 3. An arm 4 is attached to the shaft 3 and supports a lever 5 which extends across the shaft and is connected by a spring 6 with one end of a frame 7 rigid on the end of the shaft 3. The opposite end of the frame 7 has a clamp element 8 rotatively supported thereon for cooperation with a laterally movable and rotative clamp element 9 for holding one end of the wire clamped between them during the winding operation. The wire passes to the winding mechanism between guides 10. The clamping element 9 is mounted on a longitudinally movable and rotative rod 11 extending through the rotative clamping element 8 and the frame 7 to an abutment 12 on the lever 5. A spring 13 on the rod 11 closes the clamp by moving the part 9 toward the part 8. At the proper time the lever 5 is operated by the spring 6 to cause the abutment 12 to move the rod 11 in opposition to the power of the spring 18 to open the clamping device and release the wire.

The frame 7 is formed with a channel 14 of sufiicient depth and width to receive the proper number of layers of wire to form one side of the coils. A block 15 is attached to the frame 7 and supports a spring 16 having its ends extending opposite the ends of the channel 14. The function of this wire device is to eject the coils fron'i the channel 14 at the proper time. \Vhen the coils are wound the ends of the spring 16 are bent to the plane of the bottom of the channel 14. lVhcn the mechanism is operated to permit ejection of the coils as hereinafter explained the ends of the spring 16 eject the coils from the channel 14.

A frame 17 is attached to a bar 18 mounted for longitudinal sliding movements on the shaft 3. As shown, the bar 18 is mount.- ed in a longitudinal groove 19 (Figs. 2 and 3) in the shaft 3. The frame 17 has a pair of arms 20 between which a block 21 is pivoted. This block 21 is connected with the lever 5 by a spring 21 and is provided with a channel 22 for cooperation with the channel 14 to receive the sides of the coils. A spring 23 is attached to the block 21 and has its ends extending opposite the ends of the channel 22 to eject the coils from said channel 22 at the proper time. When the coils are wound the ends of the spring 23 are bent to the plane of the bottom wall of the channel 22.

After the winding of the coil has been completed. the frame 17 is moved a sullicient distance to cause the block 21 to ride upon the upper edge of the block 15, thus spreading and straining the coils and changing their characteristics so that the coil windings will retain their proper shape after the coil is removed from the machine. In the specific embodiment shown (F ig. 3) the block 21 is moved to a position in which the walls of the channel 22 are approximately horizontal. Thus the bottom of the channel 22 is moved a considerable distance from the bottom of the channel 14 in which the other side of the coil is wound, thereby stressing and straining the coil windings tor the purpose stated. When the frame 17 is retracted the block 21 still rides upon the upper edge of the block and moves away from the coil windings which had been in the channel 22 since these coil windings had been strained and stressed and characterized to retain the shape given them by the outward movement of the block 21. After the block 21 is withdrawn from engagement with the coil windings the spring 21 acts to restore the block 21 to cooperative relationship with the part in which the channel 14 is formed.

The bar 18 is held in sliding connection with the shaft 3 by a screw 24 passing through a longitudinal slot 25 in said bar 18 and engaging in the shaft 3 (Fig. 3). The bar 18 has a pair of standards 26, one of which forms an abutment tor one end of a spring 27, the opposite end of said spring engaging one arm of an angular latch pa l 28 pivoted to the bar 18 in the slot 25. In retracted position of the bar 18, the end of the pawl 28 engages an abutment 29 tached to the shaft 3 and thereby holds said bar 18 and its associated parts in a pos tion in which the channel 22 in the block 21 is opposite the channel 1 1 so that one side of the coil will be wound in the channel 14 and the other side of the coil will be wound in the channel 22. \Vhen the bar 18 is moved outwardly from the position in which it is held by the pawl 28, the lower edge of the block 21 rides on the block 15, and the coil is rotated and strained and characterized so that it retains its proper shape after removal from the machine and without being tied.

A bifurcated lever 30 pivotally supports a bail 31 seated between one of the arms 26 and the pawl 28. Obviously (Fig. 3), movement of the lever 30 in one direction rill release the pawl 28 from the abutment 29 and further movement of the lever in the same direction will cause the bait 31 to push the bar 18 longitudinally beyond the end of the shaft 3 and will cause the block 21 to ride upon the block 15 and be tilted there- )i, above described. The return movement of the lever 30 will rte-engage the pawl 28 with the abutment- 29 and restore the block 21 to that position in which the channel 22 is opposite the channel A.

The bar 18 supports a pair of coil bending devices 32. \Vhcn the bar 18 is moved longitudinally to position to tilt the block 21 the two spaced coil bending devices are also mov -rl. Since the lower portion of the coil is engaged in the channel 14 and the upper portion of the coil is engaged in the channel 22 at the beginning of the stressing;

operation, the parts 32 engage against one side oi the ends of the coils; that is, the parts 32 engage and press laterally an inst the sides of the ends of the coils, which ends form the connections between the side of the coil in the channel 1-1 and the side of the coil in the channel 22. By this operation, the ends of the coils are bent laterally from their longitudinal axis, the coils being subjected to considerable strain, by which strain the wire is given a characteristic whereby it will retain the desired shape for use as an armature or stator coil and the tendency of the coil to unwind is overcome. This dispenses with considerable trouble and expense in the mann'hicture of these coils. as the requirement tor tying: or holding: devices tor the coils removed.

The ends of the coils are wound about formers 33 mounted on a cross head 31 attached to a movable support 35. The support 35 on a shalt mounted for longitudinal and rotary movements in a sup 'iort 31'. The cross head 3 5i has a pair ct blocks 33 between the formers 33 arranged to re ceive the block 15 between them when the machine is adjusted for operation. The support for the head 34 which carries the end formers 33 is movable to and from position 'lor operation. Vhe in position for operation the block 15 between the blocks 38, and tie end formers 33 for the co l are oppositethe ends ot the channels Li and 22, so that the ends ot the coils are e'i en shape by the formers o3. Alter the coil is wound. the formers 33 are withdrawn from the coils. leaving; the coils tree to be stressed and shaped by operation of the block 21 and sha ed by the parts 352.

The 0}(155 head is moved by the lever 30. An arm 39 has one end attached to connections .10 whereby the shaft 36 may be moved in either direction. but left tree to rotate. The details of these connections are immaterial and are not specifically shown or described, as they are of a tan iliar type and I make no claim to such details of conslructiim. The end of the arm 39 has a notch arranged to receive a l)l0'('l 4-1 on the lever 30 so that. when said lover is oscillated. the arm 39 will be moved to shift the formers 33 to and from operative position. When the lever 30 is moved in a direction and to a position in which the latch 28 is engaged with its abutment 2f). the formers 33 for the ends of the coil are placed opposite the ends of the channels 11 and 22 and when the lever 30 is moved in the opposite direction the end formers are withdrawn from the ends of the coil to the position shown in Fig. 2, leavinc' the coil in the channels 14 and Beiore the lever 30 reaches the limit of its movement toward the right (Fig. l), the block 41 passes from the notch in the arm 39. Thus, after withiii drawal of the formers 33 from the ends of the coil, the lever 30 continues to move un til the block 21 (Fig. reaches the end of its stroke, and until the coil bending devices 32 bend the ends of the coils laterally.

Before the coil is ejected, the strand of wire is out. A stationary cutter blade 42 is attached to a support 43. A cooperative cutter blade 44 is pivoted to the support 43 and is connected with the lever 30 by a link 45 which has a slot 46 receiving one end of a rod 47 extending from the lever 30. A spring 48 connects the link 45 with the stationary arm 49. This spring acts to open the shear comprising the cutter blades and 44 by drawing the blade 44 to open position permitting the wire to pass through the guides and between the she: 2' blades 42 and 44 to the winding mechanism.

In the operation of this machine, the end of the wire is engaged between the rotative clamp elements 8 and 9 above the rod 11, after which the lever 30 is swung to the left (Fig. 1) to move the bar 18 along the shaft 3 until the pawl 28 is engaged with the abutment 29. As both clamp elements 8 and 9 are rotative about their axes, they turn on the frame 7 when the winding mechanism is started in operation. Thus, the wire is prevented from winding on said elements. In this position, the channel 22 is vertically above the channel 14 and the formers 33 for the ends of the coil are opposite the ends of said channels while the blocks embrace the block between them. The machine is then operated by closing the clutch 2 by use of any known devices for that purpose. The shaft 3, together with the winding mechanism, is thereby rotated to wind the coils in the channels 14 and 22 and upon the formers 33 for the ends of the coils. the required number of windings have been made in the coil, the end of the wire now being below the rod 11 which had turned one-half of a revolution, the clutch 2 is opened, the lever is moved to the right (Fig. 1) withdrawing the formers 33 from within the ends of the coil windings and leaving the windings supported wholly within the channels 14 and 22. A pair of fingers 5-0 (Figs. 5 and 6) are supported by the frame 17 and are operated thereby through holes in the frame 7. Further movement of the lever 30 toward the right projects the fingers 50 below the coil windings that are in the channel 14, thus holding the coil windings in said channel, and causes the bending devices 32 to bend laterally the ends of the coils to their final form, while the coil windings are subjected to such strains that the tendency to unwind is removed, as before described. Upon retraction of the fingers 50, the coil is eiected from the channel 14 by the wire 16. This movement of the lever 30 toward the right (Fig. 1) moves After the clamp element 9 away from the clamp element 8 and cuts the wire by the shear 42-44, so that the coil is free to drop from the winding mechanism.

Figs. 1 and 1" clearly illustrate the coil made by this machine and the features whereby the coil is distinguished from coils wound by machines of usual construction. As there shown, the wire is wound into coil windings comprising lateral side portions 51 having end connections 52 which are strained and bent laterally from the longitudinal axis of the coil windings by the coil bending devices 32. This straining and lateral bending of the ends of the coil windings gives to the completed coil a shape and characteristic practically overcoming the tendency of the coils to unwind when removed from the machine.

From the foregoing, it will be seen that my invention obtains considerable economies and other advantages in the manufacture of coils for armatures and stators. The neccssity of tying the coils to prevent them from unwinding is removed, the coils being subjected to such strains that they retain their final shape without the use of such tying devices. I am aware that the construction of the machine may be varied within equivalent limits without departure from the nature and principle of the invention. I do not restrict myself unessentially, but what I claim and desire to secure by Letters Patent is 1. A machine for forming armature and stator coils comprising rotary elements, mechanism for rotating said elements to wind wire into coils about said elements, means for withdrawing parts of said elements from the coil windings, and mechanism for straining laterally the ends of the coil windings after the completion of the winding operation and while the coils are supported on parts of said elements.

2. A machine for forming armature and stator coils comprising rotary elements, mechanism for rotating said elements to wind wire into coils about said elements, means for withdrawing parts of said elements from the coil windin s, and mechanism for straining the coil windings after the completion of the winding operation and while the coils are supported on parts of said elements.

3. A machine for winding armature and stator coils comprising a pair of elements for receiving the respective sides of the coil windings, end forming elements for the coil windings, means for rotating all of said elements about an axis to wind a wire on said elements, and means for operating one of said elements after the completion of the winding operation to strain laterally the ends of the coil windings.

4.. A machine for winding armature and stator coils comprising a pair of elements for receiving the respective sides of the coil windings, means for rotating said element-s about an axis to wind the wire thereon, and means for actuating one of said elements away from the other after the completion of the winding operation to strain the COll windings.

5. A machine for winding armature and stator coils comprising a pair of elements for receiving the respective sides of the coil windings, means for rotating said elements about an axis to wind the wire thereon, means for actuating one of said elements away from the other after the completion of the winding operation to strain the coil windings, and means for bending laterally the ends or" the coil windings.

G. A machine for winding armature and stator coils comprisin a pair of elements, end forming elements tor the coil windings, means for holding the end orming elements in cooperative relationship to said pair of elements, means for rotating all of said elements about an axis while they are in cooperative relationship to wind wire on all of said elements, means for withdra ting the end forming elements from the coil, and means for bending laterally the ends of the coil windings and subjecting said windings to strains to set the coil in its final shape.

7. A machine for winding armature and stator coils comprising a pair of elements, end forming elements for the coil windings, means for holding the end forming elements in cooperative relationship to said pair of elements, means for rotating all of said elements about an axis while they are in cooperative relationship to wind wire about said elements. means for withdrawing the end forming elements from the coil, mechanism for bending laterally the ends of the coil and subjecting said coil to strains while the coil is on sa d pair of elements, and means for holding the coil on said pair of elements during operation of said straining and bending mechanism.

8. A machine for winding armature and stator coils comprising a pair of elements for receiving the respctive .dcs of the coil windings, end forming elements for the coils. means tor holding the end forming ele ments in cooperative relationship to said pair of elements, means for rotating all of said elements about an axis while they are in cooperative relationship to wind wire about. said elements. means for withdrawing the end forming elements from the coil, mechanism for bending laterally the ends of the coil and sabjectin said coil to strains while the coil is on said pair of elements, means for holding the coil on said pair of elements during operation of said bending and straining mechanism. and devices for ejecting the coil from said elements.

9. A machine for forming armature and stator coils comprising mechanism for winding wire into a coil, and devices for bending the ends of the coil into lateral curvature while the coil is mounted on said mechanism.

10. A machine for forming armature and stator coils comprising mechanism for winding wire into a coil, devices for bending the ends of the coil into lateral curvature while the coil is mounted on said mechanism, and elements holding the coil on said mechanism while the ends of the coil are being bent as aforesaid.

11. A machine for forming armature and stator coils comprising mechanism for Windin wire into a coil, devices for bending the ends of the coil into lateral curvature while the coil is mounted on said mechanism, elements holding the coil on said mechanism while the ends of the coil are being bent as aforesaid, and mechanism for withdrawing said elements from the coils to permit ejection of the coils from the winding mechanism.

12. A machine for forming armature and stator coils comprising a rotary element having a channel extending transversely of the axis of rotation, a rotary frame movably supported adiacent to said element for rotation about the same axis, an element pivoted in said frame and having a channel transversely of the axis of rotation, a pair of coil end forming elements, means "for holding said end forming elements in cooperative relationship to said channeled ele ments, mechanism for rotating all of said elements to wind wire into a coil in said channels and about said end forming elements, means for withdrawing said end forming elements from the coil, and means for moving said frame and said pivoted ele ment to strain the coil.

13. A machine for forming armature and stator coils comprising a rotary clment having a channel extending transversely of the axis of rotation, a rotary frame movably supported adjacent to said element for rotation about the same axis. an element pivoted in said frame and having a channel transversely ot the axis of rotation. a pair of coil end forming elements, means for liold ing said end forming elements in (amperative relationship to said channeled elements, mechanism for rotating all of said elements about the same axis to wind wire into a coil in said channels and about said end forming elements, means for withdrawing said end forming elements from the coil, means for moving said frame and said pivoted element to strain the coil, means for holding the coil in said channels during straining of the coil by said pivoted element. and means for bending laterally the ends of the coil.

14. A machine for forming armature and stator coils comprising a rotary element having a channel extending transversely of the axis of rotation, a rotary frame movably supported adjacent to said element for rotation about the same axis, an element pivoted in said frame and having a channel transversely of the axis of rotation, a pair of coil end forming elements, means for holding said end forming elements in cooperative relationship to said channeled elements, mechanism for rotating all of said elements about the same axis to Wind Wire into a coil in said channels and about said end forming elements, means for Withdrawing said end forming elements from the coil, means for moving said frame and said pivoted element to strain the coil, means for holding the coil in said channels during straining of the coil by said pivoted element, means for bending laterally the ends of the coil, mechanism for Withdrawing said holding means to permit removal of the coil, and means for ejecting the coil from said channeled elements.

15. A machine for forming armature and stator coils comprising rotary elements, mechanism for rotating said elements to Wind Wire into coils about said elements, and mechanism for straining the coil Windings laterally after the completion of the Winding operation and While the coils are supported on parts of said elements.

16. A machine for forming armature and stator coils comprising rotary elements, mechanism for rotating said elements to Wind Wire into coils about said elements, and mechanism for straining the ends of the coil windings laterally after the com pletion of the Winding operation and While the coils are supported on parts of said elements.

CLAUDE M. MoCORD.

Lil 

